Avaliação comparativa da perda de retenção de quatro sistemas de encaixes do tipo ERA e O-Ring empregados sob overdentures em função do tempo de uso

Bonachela, Wellington Cardoso; Pedreira, Ana Paula Ribeiro do Vale; Marins, Luciana Rangel; Pereira, Tatiana Cotta Gonçalves

doi:10.1590/s1678-77572003000100009

Cited by 9 publications

(10 citation statements)

References 8 publications

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“…Regardless of the attachment design, a gradual loss of retention over time is inevitable due to the nature of the materials and the stress suffered during continuous insertion and disinsertion cycles. 13,14 The concave reconstructive sphere system enabled the reshaping of worn attachments, thus representing a valuable solution for restoring their retentive force without removal of the intraradicular post, which would involve a high risk of root fracture, obviated with this conservative strategy. Moreover, the Teflon cap of the system fits into the standard Rhein83 ® stainless -steel housings.…”

Section: Discussionmentioning

confidence: 99%

Worn ball attachments: a repair solution without replacement – a case report

Moreira¹,

Batista²,

Margues³

et al. 2020

j.rpemd

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Tooth-supported overdentures are an excellent solution for increasing the retention and stability of prostheses when compared to conventional removable dentures. However, with long-term use, both the Teflon cap (female part) and the male component of the attachment cemented in the abutment teeth may become worn, and replacement is needed. An 80-yearold female patient visited the department of Oral Rehabilitation of the Faculty of Dental Medicine of the University of Porto with a primary complaint of poor retention of the mandibular overdenture. Clinical examination revealed the presence of two worn ball attachments cemented on the mandibular canines. This clinical case reports a reliable solution for restoring the function of an overdenture with worn ball attachments without replacing the intraradicular post. The Concave Reconstructive Sphere System (Rhein 83 ®) allowed reshaping the old ball attachments, reestablishing the overdenture's retention and

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Section: Discussionmentioning

confidence: 99%

Worn ball attachments: a repair solution without replacement – a case report

Moreira¹,

Batista²,

Margues³

et al. 2020

j.rpemd

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“…[ 30 ] Studies have classified the attachment systems into high (ERA gray), medium (Locator LR white, Spheroflex ball, Hader bar and metal clip, ERA white), low (Locator LR pink), and very low (Shiner magnet, Maxi magnet, Magnedisc magnet) retention groups. [ 19 ] Significantly higher retention and stability are provided by Locator connectors[ 30 ] and Sterngold ERA,[ 31 32 ] compared to Nobel Biocare ball connectors. [ 33 ] These findings were confirmed by several studies.…”

Section: Methodsmentioning

confidence: 99%

“…Mechanical fatigue also induced some retention loss of the attachment systems during the experiment after 15,000 fatigue cycles,[ 31 38 49 ] even though it was of little valuewhen compared to the initial retentive forces. [ 23 ] Multiple pulls reduced the retentive values of the Locator attachments significantly.…”

Section: Methodsmentioning

confidence: 99%

Biomaterial aspects: A key factor in the longevity of implant overdenture attachment systems

Daou

2015

J Int Soc Prevent Communit Dent

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Background:New attachment systems are released for mandibular two-implant overdentures often without evidence-based support. Biomaterial aspects are now the parameters considered when choosing the appropriate attachment. Studies regarding their properties remain scarce.Purpose:The purpose of this review was to help the clinician in selrcting the most adapted stud attachments according evidence-based dentistry.Materials and Methods:An electronic search was conducted using specific databases (PubMed, Medline, and Elsevier libraries). Peer-reviewed articles published in English up to July 2014 were identified. Emphasis was given on the biomaterial aspects and technical complications. No hand search was added.Results:The electronic search generated 115 full-text papers, of which 84 papers were included in the review. The majority were clinical and in vitro studies. Some review articles were also considered. Papers reported survival and failures of overdenture connection systems. Emphasis was laid on attachment deformation.Conclusion:Implant overdentures long-term follow-up studies may provide useful guidelines for the clinician in selecting the type of attachment system and overdenture design. Locator attachments are more and more used, with lesser complications reported.

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“…relatou a reabilitação protética de um paciente com recorrência de granuloma central de células gigantes. A prótese obturadora cirúrgica ou imediata confeccionada para ser instalada durante o ato cirúrgico, foi posteriormente modificada em uma prótese obturadora provisória para vedamento do espaço velofaríngeo, enquanto os tecidos moles ao redor do defeito palatal cicatrizassem.Ao final da cicatrização foi confeccionada uma prótese obturadora retida pelo sistema barra-clipe, verificando-se acentuada melhora na fala, mastigação e deglutição do paciente Bonachela et al (2003). descreveram que, em estudo feito entre o sistema Oring e o sistema ERA®, ambos os sistemas de encaixes apresentaram perda de retenção ao longo do tempo, sendo que o sistema ERA® desde o início apresentou maior retenção quando comparado ao sistema O-ring.…”

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Avaliação das tensões ósseas geradas por prótese obturadora maxilar implanto-retida pelo sistema ERA® por meio da análise de elementos finitos

Costa¹

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Searching to improve quality of life of the patients that had sustained structural maxillary loss with the necessity of rehabilitation, either through surgery or obturator prosthesis, which is a therapeutic resource to minimize functional, esthetic and psychological impairments. This study evaluated the biomechanical behavior of an Okay Class II obturator prosthesis implant retained and ERA® system, analyzing the resultant stress on the soft and bone tissue. The finite element analysis was made with a digital model constructed from a computed tomography. Four implants were positioned on the left maxillae, on the following regions: lateral incisor, canine, second premolar and first molar, with the ERA® system positioned on the extremities of a metallic bar. The software used to create the BioCAD 3D model was Rhinoceros v. 5.0, including the CAD models from the implants, UCLAS and ERA® system. The ERA® CAD model was obtained from a microCT SkyScan 1176 Bruke images, on the BMP and TIFF format. The TIFF images were exported to the img2dcm software, converted in DICOM format and finally exported to the software Invesalius, were the STL mesh was created. All mesh were imported into the software Hyperworks v. 13.0 and the post-processing was visualized on Hyperview. The force applied was of 80N over the occlusal platform and of 35N over the incisal platform. A quantitative analysis was performed, corresponding to the maximum main stress, expressed in MPa. The obturator prosthesis suffered its maximum dislocation on the region with no bone support, with the bone resection line as fulcrum. Less tension forces were observed, when comparing to compression. The forces observed were favorable to maintain the implant retained prosthesis stabilization, with good distribution over the soft and bone tissues, suggesting that the ERA® retention system is suitable to Okay Class II maxillary bone loss.

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Avaliação comparativa da perda de retenção de quatro sistemas de encaixes do tipo ERA e O-Ring empregados sob overdentures em função do tempo de uso

Cited by 9 publications

References 8 publications

Worn ball attachments: a repair solution without replacement – a case report

Worn ball attachments: a repair solution without replacement – a case report

Biomaterial aspects: A key factor in the longevity of implant overdenture attachment systems

Avaliação das tensões ósseas geradas por prótese obturadora maxilar implanto-retida pelo sistema ERA® por meio da análise de elementos finitos

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